Sewing-machine.



PATENTED MAR. 3, 1968.

H. E. LAPLANT. SEWING MACHINE..

APPLICATION FILED` DEO.15. 1906.

2 SHEETS-SHEET l.

Vim/Hna c s PTENTBD MAR. 3, 1908 No. 880,890. A

H. E. L PLAN'H SEWING MACHINE.

APPLICATION FILED 9120.15, m06.

r seien...

HARRY E..LA PLANT, or KnNNn'rT, ciL-iroRNiA..

SE WINGMAGHINE Specification of Letters atent.

no. scacco.

Application filed December 15, 1996. Serial No. 348,088.

, AKennett, inthe county of Shasta and State of California, have invented new and useful Improvements in Sewing-Machines, oi which the following is a specification.

' The object of the present invention is to provide a sewing machine which can be manufactured and sold at a low cost, especially adapted for stitching leather, although it may also he used for stitching cloth and other material. y

ln the accompanying drawing, Figure 1 is a side elevation, partly broken Iaway, of my improved sewing machine Fig. .2 is a section on the line XM2 of Fig. 1; Fig.- 3 is a broken plan view of a portion of the lower arm of the machine; Fig. 4 is a cross section of the upper arin on the line 4 4 of Fig. 1 Fig. 5 is a broken horizontal section thereof.; Fig. 6 is a vertical-section of the head and the parts supported thereby taken longitudinally oi the supporting arm; lfiof. 7 is a vertical section' taken at right ang es to that oi Fig. (ij, Fig. il, is a hroken end view; Fig. S) is n side view on a small scale showing an attachnient for using foot power.

Referring to the drawing, it will be seen that the of the machine comprises a yoke-shaped hollow casting l having upper and ,lower nrins 2 3 nnd a bach 4. yThis hollow casting is closed at the back and top by a plate or cover 5, and the bottoni of the lower arrni is closed by u. plate (3. Screwed upon the front end oi thc upper nrni is a head 7, through which passes a transverse shaft 8 carrying a gear wheel i), and a pinion -10. The pinion 1() is loose on the shaft 8 and is actuated from the gear wheel hy means of apawl i1 on the gear wheel f and a ratchet 12 secured to thepi'nion 10. gear wheel 9 meshes with a horizontal rack 13 reciprocating in said head 7, and attached to a handpiocc 14, the lower ond of which is groovcd to slide upon a tongue l5 upon thc top of the upper arm 2, thc top olt said handpiece being also provided with lguide rods 16, which pass through the top of thc guide, and are guided thereby. A spring l7-norinnlly retracts the handpiecbl after it has been moved towards the guide. Depending from the lower portieri of the'handpiece are two spring plates 18 which pass on each side of a i; ink 19 guided in the lipper arm, one of which hit-es, when the han( piece is drawn forn 'link 19.

The

ward, is adapted to engage a shoulder 20, of the link at its forward end, and thereby move said link forward. When the link reaches the end oi its forward movement, a wedge 21. in the front end of the arm 2, and beneath said. link 19, spreads the lower ends of the spring plates apart, and thereby withdraws the plate from the shoulder, permitting the link to return to its original position. This it does instantaneously under the action of a spring 22, which is inclosed within the hollow back of the yoke-shaped frame, and is adjusted by means of a screw 23, and

,bears upoii the lower arm oi a lever 24, the

upper arm of said lever being pivoted to said is pressed by the said spring, is pivotally attached to a lower link 26, which slides in the lower arm 3 and is offset at its forward end and formed into a rack27, engaging a gear wheel 28,which in turn engages a gear whee 29, which carries an oscillating shuttle 30. This shuttle is of the saine character as that used in the Singer sewing machine, and need not be here further specified. By ineens of the reciprocating movement irnparte'l to the upper link by `the handpiece 14 and the spring 17, an oscillating movement ol' nearly a complete revolution is imparted to said rotary shuttle. i

The transverse shaft 8 in the head 7,

v y Patented March 3, 1.908.4

The lower arin of said .'lever, which which is oscillated hy the movement of the rier 34, normally pressed upwards l y means of a coiled spring 35, contained between the top ofthe head 7 and an adjusting screw 36 upon the end of said. carrier. portion of said carrier has a pin 37 moving in a slot 38 formed in a cylindrical extension 39 of said head 7. 'lhc lower end of said carrier slides in said extension 39 and has also a sleeve 4() attached thereto b a pin 41 through said slot, said sleeve 40 siding on the extension 39. The needle 42 is secured in the lowerv end of the carrier by a set screw 43, and the thread 52 is passed -to The lower eoy the needle along a groove 44 in said carrier point 'of the needle. The parts are so arranged that, after the'needle has carried the thread through the cloth, the rotary shuttle makes an oscillation to catch the thread which has been passed through the cloth, making a stitch in the manner common to the Singer and other sewing machines.

The presser foot 54 is carried by a presser 55 having a slot 56 through which passes a pin 57 carried upon a plate 58 rotatably carried upon the lower end of said' extension 39, and secured thereon by a nut 90 said pin and slot thus form a vertical guide for said resser. A coiled spring 6() is interposed etween the plate 58 and a disk or washer 59 upon the presser, and tends to press the foot down upon the material. To raise the presser foot there is provided a cam 61 rotatlng upon a vertical post 62 and having an inclined shoulder 63 adapted to engage a pin 64 upon the presser, said cam being pro-- vided with an arm 65 to rotate the same. Thus by turning said arm 65 through an angle, ot a little over 90 the presser footcan be raised from oi? the material.

The materiai is fed, .as the stitching. takes place', by-the following contrivance. The

s rings ,70 on yes upper end" of the tongue 66 which 67 an arm 68 presser is formed into a passes through an aperture extending from a collar 69 Wluch surrounds the extension 39.- Said eollar is normally upheld by means of coiled posts 71 on the plate 58.

hen the needle descends the pin 37 in the slot 38 engages said collar 69 at the end of the downward moves said collardownwards4 The tongue 66 at its uper end is inclined downwards and inwar s or towards the needle carrier, while, at its lower end, it is in clined downwards and outwards therefrom. Consequently, the rst part of the down- '.ward movement of the collar 69 is to move the u perfend of the presser inwards or towar s the needle carrier, so that the lower end. moves outwards or away therefrom, the pin 57 acting vas a pivot, u on which the presser turns as a ever. imultaneously A with this movement, a shoulder 76 upon the t lpassing through a slot in sleeve 40 ei ages the inner end 73 of a leverv 74 passing t rough the slot inthe post and here pivoted,the outer end of said lever the presser and eing secured to said presser by a spring 7.5. The engagement of said shoulder with said nose depresses the nose and thereby raises the presser foot. 'lhecontinued downward motion of the needle carrier causes the inner endet the lever 74 to slip past the upper side ofthe sleeve 40, so that said lever is released, and the presser is thereby dropped instantaneously by the pressure of the spring 75. This ytakes placeduringr the time slotted arm 68 of the collar 69 is descending,

so that the linstantaneous movement of the springplates, said movement of the needle, and

I a hand 'reciprocating device, that the l vdepending therefrom,

ssdseo raised from the material, and, as the needle' descends, the resser foot is simultaneously moved forwardp ing a position upon the material forward of that which it had before the needle entered4 Then as the needle is withdrawn, the collar 69 rises, being engaged by the sleeve 40 and the slotted arm 68 of said collar engages again the upper portion of the tongue- 66 of the presser, causing the foot to move rearwards or away from the needle, and advancil ing the cloth the length of a stitch.

Just before the spring plates 18 are spread and downward, thus assumto release the shoulder 20 in the link 19, the

needle springs up to produce a loop on the. underside ol the cloth. This upwaprl'jump of the needleis caused by the pinion 10 arriving, in its rotation, at the upper end of the rack 33.` As the pinion then continues to rotate, the rack jumps up afdistance of one tooth, and this imparts a corresponding movement to the needle, producing a loop in the thread. This movement takes placent a time, corresponding to the movement of the horizontal rack, just before the spring plates. 18 are released from the'shoulder 2.6. Im mediately after the needle hasjumped u leavingthe loop of' thread beneath the clot the said spring'plates are released from the shoulder in the upper link 19, and the upper link in like manner quioklysprings backnnder the action of the sprinor 22, causing the lower link to actuate the osci lating shuttle to make its return movement, and in su ch movempnt of the shuttle, the loop ol thread is passed oven the shuttle to make the lock stitch. It is evident from this that it cannot be permitted 8, for if it were, since the pinion ains a tooth on the rack 33 at each stitch, `t e 'rack 13 would also gain on 'the-rack 33 at each stitch, in which case the device would he linrthat the pinion 10 should be fast on the shaft i operative. Consequently the pinion 10 is advanced u on the shaft 8 byy means of the r pawl 11 an ratchet 12.

I claim:

'1. In a sewin of a head, a nee le Icarrier tically therein, a shaft, a gear wheel carried thereon, a'pinion loose on the shaft, a pawl on the gear wheel, and a ratchet on the y 115 machine, the combination l reciprocating ver-v pinion of said pawl, a horizontal rack engaging said gear wheel chend piece attached to said rack, and a sprii for returning the needle carrier substantia y as described.

2. In a sewing machine, thecombination a link and a guide therefor, said linllinlpagshing between said ving at its. forward spring plates Y 'plate, tho upper end of the presser being which said tongue passes, .substantially as end a shoulder adapted to be en aged by one of said plates to move said link orward with the hand piece, a wedge arranged to spread the lower ends of the sprin lates and thereby release the link whenit ias arrived at a predetermined position, a spring for retrac'ting said link, a shuttle, and means actuated by the movement of the link for moving said shuttle, substantially as described. 3. In a sewing;y machine, the combination of a hand reciprocating device, spring plates depending therefrom, a link and la guide therefor, said link 1passing between said spring plates, said lin having at its forward end a shoulder adapted to be engaged by one of said plates to move said'link forward with the hand piece, a wedge arranged to spread the lower ends ofthe spring plates and thereby release the link when it has arrived -at a predetermined position, a s ring for' retracting said link, a shuttle, an means actuated by the movement oi the link for moving said shuttle, said meanscomprising a lower link and a guide therefor, an operative connection between said lower link and the shuttle, a lever attached at its ends to said links, a spring acting upon said lever, and a screw screwed through said spring for adjusting the same, substantially as described.

4. In a sewing machine, the combination of a head having a downward slotted extension, a needle carrier reciprocating vertically in said extension, a sleeve around said eX- tension. and attached to said needle carrier, a plate rotatably carried upon the lower end of said extcnsioin'a presser carried byysaid formed into a tongue, and an apertured collar surrounding said extension and through described.

5. ln a sewing machine the combination ol a head having a downward slotted extension, a needle carrier reciprocating vertically 1 in said extensin, a sleeve around said extension and attached to said needle carrier,

a plate rotatably carried upon the lower end.

of said extension, a presser carriedby said late, the upper 'end oi1 the presser being ormed into a tongue, an apertured collar surrounding said `extension and through which said tongue passes, a pin carried byA the needle carrier and adapted to engage vsaid collar to move it therewith, the tongue which said tongue passes, a pin carried by the needle carrier and adapted to engage said collar to move it therewith, the tongue being so formed'that the reciprocating Inovement oi the collar produces a vibratory movement lof the presser, a pin carried by said plate upon which the presser is pivoted,

a post upon said plate, aiever ivoted to said post, the outer end of said ever engaging said presser, and the needle carrier sleeve having a shoulder adapted to engage the inner edge of the lever, substantially as described.

ln testimony whereof l have hereunto set my hand 1n the presence of two subscribing Witnesses.

' HARRY E. LA PLANT. Witnesses D. B. RmnARDs, FRANCIS M. WRIGHT. 

